CCleaner is our system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally it contains a fully featured registry cleaner. But the best part is that it's fast (normally taking less than a second to run) and contains NO Spyware or Adware!

Microsoft have released the final build of Windows 8 to developers, so we've spent the last week finalizing changes to CCleaner to allow us to fully support this next generation OS. Download version 3.22 of CCleaner now to update your cleaning definitions and compatibility with Windows 8.

Or if you're a CCleaner Professional user, your application will update automatically!
Changes:

Added full support for Windows 8.Improved Startup Item tool compatibility.Improved benchmarking for Cleaner summary results.Improved support for Custom Files and Folders.Improved file security algorithms.Added option to Exclude a single registry value.Improved wildcard support in search boxes.Fixed support for Windows 2000.Minor GUI improvements.Minor bug fixes.